Finding the Third Proportional to 2,031.50 and 4,390

Step by Step Solution

1. Step 1: Write the proportion equation
   2,031.50 : 4,390 = 4,390 : x
2. Step 2: Convert to fraction form
   2,031.50/4,390 = 4,390/x
3. Step 3: Cross multiply
   2,031.50x = 4,390 × 4,390
4. Step 4: Simplify right side
   2,031.50x = 19,272,100
5. Step 5: Solve for x
   x = 19,272,100/2,031.50
6. Step 6: Final answer
   x = 9,486.64